Assemanu is a Sixth House cave on a small island west of Hlaalu Canton. Assemanu is home to a large branch of the sinister Sixth House cult, led by a named Ascended Sleeper called Dagoth Hlevul, which is influencing people in Vivec City, Suran and as far away as the Arano Plantation.
Also in this cave is the Robe of St. Roris. The cave is quite dark and has ledges and bridges; levitation and some form of light is helpful here. The doors to the shrine are locked. An old key to open them is found on a dead Ordinator.
- The Inner Shrine is locked from the inside, it requires a key to open the doors and the key is on the body of a dead Ordinator in the cave entry area, up a ramp in the north end. To get around this trap, use a Recall, Almsivi or Divine Intervention to get out of the central shrine.
- The Robe of St. Roris is in a hard to reach locked chest above the bells that may require levitation or extreme Acrobatics skills to get to. A rusty key found on a dreamer here opens the chest.
- The place is pretty light on treasure otherwise, although a fair amount of Indoril Armor, can be found on the three dead Ordinators in the outer cave. Of course, there's the usual Sixth House Bell Hammer, as well as twelve ash statues, and Dagoth Hlevul has his own Sixth House amulet.
Having attained the rank of House Father in House Hlaalu, the Nerevarine may go to Duke Vedam Dren for a couple of quests which result, ultimately, in the Nerevarine being declared Grandmaster of the House.
While advancing through the quest Antabolis Informant and sleeping in Ald'ruhn, Balmora, or Vivec, the Nerevarine receives some disturbing dreams about Dagoth Ur. The second dream comes during the quest Vivec Informants and the last dream after the quest Zainsubani Informant.